Tire.



M. 0. O'VEBEMMI.

URE- Ammmoa hues was 20. ms.

Patented Apr. 30, 1918.

z SHEETS-SHEET I- m mus 0, 01 m YOIK, I. Y.

Specification of Letters Patent.

Patented Apr. 30, 1918.

Application fled June 90, 1818. Serial llo. 774,818.

To all whom it may concern:

Be it known that I, Max Camus Ovnnmn, a citizen of the United States reading at New York, in the county and tate of New York, have invented certain new and useful Improvements in Tires, of WhlOh the followin isa specification.

resent ments 1n pneumatic tires or shoes. The tire has an extra deep rubber nose-' or tread portion which minimizes the danger of puncture and which itself, by virtue of certam ada tations of grooves and recesses, is given su flexibilities and abilities to yield under load and work that in spite of its depth and mass it does not tear loose from the carcass. Further, these same adaptations prevent the hea nose portion from throwin destructive endin action on the side we 5 of the tire b distributin this bending work throughout the heig t of said side walls mstead of allowing it to concentrate destructively at any particular zone therein. Thus, m improvements minimize blow-outs at the si es of the tire. My improved tire further reduces the liability of blow-outs because its side walls can be saved from a great deal of bending work by makim it possible to inflate the tire until it is hard,-that is, until it is blown up to the full pressure recommended for the particular size of tire,-and yet said tire will ride sufliciently easy due to the extra resiliency derived from the thick, recessed, cushioned tread of my tire. In the drawings showing one of the particular embodiments which my improvements in tires may take, Figure 1 is a fragment in side elevation of a pneumatic tire within my invention; Fig. 2 is a cross sectional view thereof; Fig. 3 is a plan View of the tread of the same tire; Fig. 4 is a perspective view on an enlarged scale compared to the previous figures, of one of the cores or inserts used in the manufacture of this tire for forming one of the transverse grooves, together with ebble e ect1n projections; Fig. 51s a s arly enlar perspective view of one of the cores or inserts used for formin the recesses 8' and Fig. 6 is asection on t e line 6-6 in ri 5.

I will now describe the specific devices of the drawings, reserving it to the claims to point out the novel features and to define the scope of the invention, it being underinvention relates to improve-- I large stood that the claims will be given the due range of equivalents to which they may be entitled in view of th ar The expressions herein directed to the up and down relationship of the parts of the tire refer to a section of the tire positioned as if in ground contact as in Fig. 2.

2 is a protective shoe for the innertube 1 of a pneumatic tire. It comprises the ordinary fabric carcass 4 and my improved, greatly thickened nose-portion 3 as compared with the ordinary shoe, thereby so far separating the tread of the shoe from the inner tube as to minimize the liability of puncture. The nose-portion may be made of the re lar neumatic tire tread stock or any at er ru ber compound or compounds suitable for the purpose.

5-5 are frequently occurring grooves substantially as deep as the nose-portion extending alternately from the sides'of the shoe past the center of the tread (compare the plan view Fig. 3) in order to overlap each other. Said grooves become increasingly wide as they approach the tread and are esplecially wide at said tread.

In t is way, the deep nose-portion is subdivided into numerous load-supportin parts 6 having flexibilities and abilitles to 0w or yield in every direction, longitudinally or aterally, thereby assisti in preventing the deep nose-portion from torn off the carcass when the tire is in action.

88. are large area. recesses or weakenings formed in the sides of the respective load-supporting parts 6. These recesses are deepest at a zone located between their top and bottom boundaries, and thence graduate in depth toward said boundaries and also graduate in de th toward their side boundaries; and at t ese boundaries the bottoms of the recesses meet with the rounded surface of the tire. Further, said boundaries of the individual recesses converge toward the tread.

The relatively massive noseortion of my tire would throw undue ben ing work on the ,upper SIde walls, were it not for these area recesses 8-8 which, as will be seen from a consideration of Fig. 2, act to distribute the bending so that it occurs more uniformly throughout the height of the side walls of the tire instead of conoen destructively in any one zone in said walls.

Further, by permitting an easy distribution of the stresses created in the tire when in action, these same recesses R coiiperate with the grooves 5 in preventing the nose-portion from tearing loose from the carcass.

9-9 are pebble ejecting nipples or projections extending integrally from the bottom and sides of each groove 5.

10 in Fig. 4-is the core or insert used in the manufacture of the tire for formin one of the transverse tread-grooves 5 an the pebble ejecting projections 9. When in use, the portion 10 of the insert is located at the central tread-portion of the tire being manufactured, and the portion 10 at the side of the tire, whereas the recesses l0 form the pebble-ejectors 9.

11 in Fig. 5 is a perspective view of the insert used in forming one of the spaces 8; and Fig. 6 is a section on the line 66 in Fig. 5. The concealed face of this insert in Fig. 5 and the curved face 11 in Fig. 6 is located at the curved outer periphery of the tire in course of manufacture; whereas the face 11 is the bottom of the insert; and 11 are its sides.

Having thus described my invention, what I claim is: i

1. A. pneumatic tire or shoe comprising a deep nose portion divided by frequent deep, transverse grooves, each extending from one side and terminating short of the other side, defining load-supporting parts, and recesses formed in the outer portions of the load supporting parts, said recesses being of less length than the grooves but of greater width and in line with the inner ends of said grooves transversely of the nose and spaced from the inner ends of the oves.

2. A pneumatic tire or sh d: comprising a carcass and a deep nose-portion divided by frequent deep, transverse grooves into loadsupporti parts whose outer sides at the sides of i zfie tire are weakened over a large area by recesses formed therein, said recesses being deepest at a zone between their top and bottom boundaries and thence graduated in depth toward said boundaries.

3. A pneumatic tire or shoe comprising a carcass. and a deep nose-portion divided by frequent deep, transverse grooves into loadsupporti parts whose outer sides at the sides of 25a tire are weakened over a large area by recesses formed therein, said recesses bein deepest at a zone between their top and aottom boundaries and thence graduated in de th toward both their top and bottom and t eir side boundaries.

4. A pneumatic tire or shoe comprising a deep nose portion divided by frequent deep, transverse grooves alternately terminating short of the opposite sides of the tire, defining load supporting parts and recesses formed in said parts and of less inward extension than the grooves, the side boundaries 'ng toward supporting parts whose outer sides at the sides of the tire are weakened over a large area by recesses formed therein, said recesses being deepest at a zone'between their top and bottom boundaries and thence graduated in depth toward said boundaries, the side boundaries of the individual recesses converging toward each other in the direction ofthe tread.

6. A pneumatic tire or carcass and a deep frequent deep,

shoe comprisin a nose-portion divided y transverse grooves intoloadsupportin parts whose outer sides at the sides of e tire are weakened over a large area by recesses formed therein, said recesses being deepest at a zone between their top. and bottom boundaries and thence graduated in depth toward both their top and bottom and their side boundaries, the side boundaries of the individual recesses converging toward eaeh other in the direction of the tread.

7. A pneumatic tire or shoe comprising a carcass and a noseortion divided into load-supporting parts byyfrequent transverse grooves substantially as deep as the noseportion itself extending alternately from the sides of the tire past the center of. the tread in order to overlap each other, the outer sides of said load-supporting parts'at the sides of the tire havinglarge area recesses formed therein.

8. A pneumatic tire or shoe comprising a carcass and a nose-portion divided into loadsupporting parts by frequent transverse grooves substantially as deep as the noseportion itself extending alternately from the sides of the tire past the center of the tread in order to overlap each other, the

outer sides of said load-supporting parts at the sides of the tire havin large area recesses formed therein, sai recesses bcin deepest at a zone between their top and bog tom boundaries and thence graduated in depth toward said boundaries.

9. A pneumatic tire or shoe comprising a carcass and a nose-portion divided into loadsupporting parts by frequent transverse grooves substantially as deep as the noseportion itself extending alternately from the sides of the tire past the center of the tread in order to overlap each other, the

outer sides of said load-supporting parts at the sides of the tire havin large area recesses formed therein, sai recesses being deepest at a zone between their to and bottom boundaries and thence grasuated in depth toward both their top and bottom and their side boundaries. 7

10. A pneumatic tire or shoe comprising a carcass and a nose-portion divided into load-supporting parts :H frequent transverse grooves substanti y as deep as the nose-portion itself extending alternately from the sides of the tire set the center of the tread in order to over ap each other, the outer sides of said load-sup orting parts at the sides of'the tire having r e area recesses formed therein, the side undaries of the individual recesses'eonvergin toward each other in the direction 0 the tread.

11. A pneumatic tire or shoe comprising a carcass and a nose port16n"divided into load-supporting parts bH' frequent trans-1 verse grooves substantia y as deep as the nose-portion itself extending of the tread in order to overlap each other, the outer sides of said load-supporting parts at the sides of the tire having arge area recesses formed therein, said re being deepest at a zone between their top and-bottom boundaries and thence aduated in depth toward said boundanes, the side boundaries of the individual recesses conalternately from the sides of the tire past the center ver toward each other in the direction of e tread.

12. A pneumatic tire or shoe comprising a carcass and a nose-portion divided mto load-supporting arts bfi frequent transverse grooves su tia y as deep as the nose-portion itself extending alternately from the sides of the tire ast the center of the tread in order to over p other, the outer sides of said load-supporting parts at the sides of the tire having arge area re- 0 formed therein, said deepest at a zone between their to and bottom boundaries and thence gra uated m degth toward both their. top and bottom an their side boundaries, the side boundaries of the individual conver toward each other in thedirectlon o the In testimony whereof, I ain'x my signature in presence of two witn MAX CYRUS OVERMAN.

Witn:

E. W. Sorrmm, Jr., J NIUSTADPI.

Corrqction In Lqtters Pgt e nt No. 1,264,205.

It is hereby certifiod th n in bothers Patent No. 1,264,205, April 30,

1918, upon the application of Max Cyrus ovafm of New York, N. Y for m improvement in Tirea," an errotappoai-s in the printed specification oomction as follows: Page 1, line 97, befora tho yord "boundaried insert the word sid and that the said Lattera Patenhghould bo road 6th this oopoction therein that tho uma gay oonforro to the record of the case in the Potent Oflioe.

v Signed and son-16d this 4th day of Juno, A 11,1918.

" F. w. H. CLAY,

' Acting Commissioner of Pat-mi 

